Could you go into a bit more detail about why you don't recommend this type of card? Why are they more trouble than they're worth?
most GPUs have 2 outputs only. If you see three physical outputs on your card, two of them are connected to the same GPU output and cannot be used at the same time. Which ones depend on your model.
There may also be driver trouble, as those cards aren't too common and not too well tested.
My suggestion is to find a card with 2 DVI outputs (and nothing else). DVI and HDMI are physically compatible, so you'll be able to attach your TV with a simple DVI->HDMI cable. Those can be bought for 10-25€, depending on cable length, and won't cost more than HDMI cables of the same length.
Also HDMI on a graphics card is not very usefull. What is HDMI? It's glorified DVI with sound. You can get a DVI to HDMI adapter if your TV supports that. Sure you wont have sound coming from the graphics card but sound over HDMI is flaky at best of times (not just in linux ;-) )
Most graphics cards carry a DVI to HDMI adapter. If it doesnt it costs near to nothing.